DNC Hydraulics provides expert manufacturing, modification, and repair of hydraulic cylinders — from 1 lb to 40,000 lbs. We build and service cylinders to match your exact application, with specialized solutions for slide gate cylinders, small mill cylinders, and large mill cylinders. Every unit undergoes a thorough inspection to identify the root cause of failure and is rebuilt to deliver long-term performance. Our in-house Quality Control Department ensures each cylinder meets strict surface finish standards, including 8–12 Ra for dynamic surfaces and 32 Ra for static surfaces.
AGC cylinder solutions are a core specialty at DNC Hydraulics. We manufacture, modify, and repair automatic gauge control cylinders and other critical hydraulic components built for demanding industrial applications. From small mill equipment to large-scale mill operations, our cylinders are engineered to deliver precision control, durability, and long service life.
At DNC Hydraulics, we don’t just repair hydraulic cylinders — we restore them to better-than-OEM quality. Whether servicing an AGC cylinder, a large press cylinder, or a specialty casting cylinder, our process begins with a detailed root cause analysis to eliminate recurring failures.
We apply the correct solution the first time using advanced finishing technologies selected for your operating environment, including:
HVOF Thermal Spraying
Industrial Chrome Plating
Electroless Nickel Plating
Each process is chosen based on pressure, temperature, load, and duty cycle to maximize performance and reliability.
DNC Hydraulics specializes in restoring the heavy-duty cylinders that keep steel mills running. Our experience includes automatic gauge control cylinders, roll adjustment cylinders, furnace doors, billet pushers, shear cylinders, ladle and tundish manipulators, coil lifters, and other critical mill systems.
Our technicians identify issues such as thermal scoring, chrome degradation, rod straightness variation, pitting, seal fatigue, and bore damage in large diameter bore cylinders before developing a repair plan built specifically for mill conditions.
We apply industrial hard chrome, precision honing, complete resealing, rod fabrication, and HVOF thermal spray coatings to ensure every large diameter cylinder meets or exceeds OEM performance standards. All cylinders are pressure-tested and quality-verified to perform in high-temperature, high-load, 24/7 environments.
Steel mills across the U.S. Heartland rely on DNC Hydraulics for fast turnaround, extended service life, and AGC cylinder rebuilds that stand up to heat, scale, and continuous operation.
Our certified technicians are equipped to minimize your hydraulic service needs. We restore your hydraulic equipment to new condition and provide a maintenance program to ensure the equipment remains intact for the years to come. Whether on the road or in our facility, we take pride in being one of the most efficient and effective in the industry.
We provide a one-year warranty on all completely rebuilt cylinders as long as they run with clean filtered oil and correct start-up procedures from the service manual before our operation. We do not cover failures due to contamination under our warranty.
